METHOD OF HIGH-VISCOSITY OIL POOL DEVELOPMENT Russian patent published in 2008 - IPC E21B43/24 

FIELD: mining.

SUBSTANCE: method involves drilling vertical injection wells and horizontal production wells. Steam alternated with air is injected over injection wells, and oil is withdrawn over production wells. Horizontal holes of two production wells are positioned at the same line towards each other, their ends close to each other. Horizontal holes pass 1.5-2.5 m above the productive stratum bottom and are perforated. The bottom of vertical injection well perforated at 0.5-1.5 m interval from the bottom is positioned 3.5-4.5 m higher than the horizontal hole ends of production wells. Horizontal holes of the two other horizontal wells with the same parametres and similar injection well position are arranged parallel to horizontal hole line of the two production wells to form parallel withdrawal and working agent injection lines.

EFFECT: increased oil yield of a pool.

1 ex, 2 dwg